Post-Inspection Performance Waivers Can Bar Claims Arising from Later Website Migration

1. Introduction

This dispute concerns who bears the risk of a website’s declining performance when the parties rearrange the contractual sequence for inspection and transfer. Joon Bum Yoo purchased the Steps to Health website business from Grupo MContigo S.L. for $250,000. After Grupo transferred business assets and relaunched the website, its traffic allegedly fell because Grupo failed to enable website indexing—the functionality allowing search engines to discover the site.

Yoo claimed that this mistake violated Grupo’s contractual promise not to act outside normal business practices during the asset-transfer process. The Sixth Circuit nevertheless affirmed dismissal. Under the asset purchase agreement (“APA”), expiration of the inspection period triggered a waiver covering specified business-performance changes, including traffic and revenue changes occurring during migration. Although the parties moved migration until after inspection, they did not correspondingly alter that waiver.

The central lesson is therefore one of contractual risk allocation: changing the timing of performance does not necessarily change the provisions allocating the risks associated with that performance.

2. Background and Procedural History

The transaction and its contractual safeguards

Yoo identified Steps to Health through an online marketplace and contacted Grupo employee Sebastien Ríos. The parties executed an APA effective November 1, 2024. Empire Flippers, LLC brokered the transaction but was not a party to the appeal.

The APA contemplated a staged transaction:

1. Initial payment: Yoo would deposit $175,000 with the broker to begin the “Migration Process,” defined as the process of transferring the assets to him.
2. Completed Migration: Yoo or the broker, exercising sole discretion in good faith, would determine that enough assets had transferred for Yoo fairly to assess associated revenue.
3. Inspection: A fourteen-day inspection period would follow Completed Migration. During that period, Yoo could inspect the assets and seek termination on specified grounds, including revenue falling below 50% of prorated average monthly revenue.
4. Waiver: If the inspection period expired without termination, a waiver covering performance-related contingencies would take effect.

Importantly, “Completed Migration” did not mean that every asset had actually transferred. The agreement expressly contemplated additional transfers afterward. It also warned that migration typically took two to eight weeks and could take substantially longer.

Section 13(c), the provision ultimately at issue, stated: Seller agrees not to take any actions in relation to the Assets outside of normal business practices throughout the Migration Process.

The parties reversed the expected sequence

Yoo deposited $175,000 on November 7, 2024. According to the complaint, the parties, at the broker’s behest, waited until the inspection period had ended before beginning migration. By November 25, the inspection period had concluded and Grupo began transferring assets.

On January 14, 2025, Grupo informed Yoo that website traffic had declined dramatically following relaunch. Grupo allegedly acknowledged that its failure to enable indexing caused the decline. Yoo alleged a 57% traffic reduction and a fall in business value from approximately $250,000 to $55,000. Attempts to correct the problem did not fully restore traffic.

The claims and the limited appeal

Yoo brought claims for breach of the APA, negligence, and breach of a separate agreement concerning website-revenue management. The district court dismissed the APA and negligence claims but allowed the separate revenue-management claim to proceed. Yoo then voluntarily dismissed that remaining claim with prejudice.

The appeal concerned only the alleged breach of § 13(c). Yoo did not challenge dismissal of his theory under § 13(a), and the appellate court did not decide the merits of the negligence or separate revenue-management claims.

3. Summary of the Opinion

The Sixth Circuit affirmed dismissal under Federal Rule of Civil Procedure 12(b)(6). Its reasoning rested on five propositions:

1. Michigan law governed the contract, and the existence of a contract was undisputed.
2. The APA’s inspection-period waiver expressly addressed changes in traffic, revenue, and other performance metrics, including changes during migration.
3. The indexing problem arose after the inspection period had expired.
4. The parties modified the timing of migration, but the complaint did not establish a corresponding modification of the waiver.
5. Yoo therefore could not plausibly maintain the particular performance-related contract claim he asserted.

The court rejected both Yoo’s argument that an “as is” clause concerns warranties rather than contract claims and his argument that the agreement waived only his right to terminate the purchase. The decisive provision was the express performance waiver, not merely the “as is” language.

4. Precedents Cited and Their Roles

A. Pleading standards and the materials considered

Steeb v. Ehart, 165 F.4th 536, 538 (6th Cir. 2026)

The court cited this decision for recounting the facts as alleged in the complaint when reviewing a dismissal. Accordingly, the appellate court treated the indexing failure and resulting business decline as allegations to be accepted for purposes of the motion, not as findings established after trial.

Blackwell v. Nocerini, 123 F.4th 479, 487 (6th Cir. 2024)

This authority permitted consideration of the APA even though Yoo had not attached it to his complaint. Grupo supplied the agreement with its dismissal motion, and Yoo’s complaint referred to and depended upon it. That procedural rule mattered because the contract’s complete terms—including its waiver—could be examined alongside Yoo’s allegation that § 13(c) had been breached.

Lindke v. Tomlinson, 31 F.4th 487, 495 (6th Cir. 2022)

This case supplied the de novo standard of review. The Sixth Circuit independently evaluated the complaint and the agreement rather than deferring to the district court’s legal conclusions.

Bell Atl. Corp. v. Twombly, 550 U.S. 544, 570 (2007)

The court applied the requirement that a complaint state a claim that is plausible on its face. Alleging a serious operational mistake and substantial financial loss did not suffice if the agreement itself foreclosed recovery on the pleaded contractual theory.

Ashcroft v. Iqbal, 556 U.S. 662, 678 (2009)

This decision required the court to accept well-pleaded facts and draw reasonable inferences favorably to Yoo while determining whether those facts supported a reasonable inference of liability. The court could accept that Grupo caused the traffic decline without accepting the legal conclusion that the mistake supported an enforceable claim under the APA.

B. Governing law and the elements of contractual liability

Baker Hughes Inc. v. S&S Chem., LLC, 836 F.3d 554, 560 (6th Cir. 2016)

The court cited this authority when recognizing the parties’ agreement that Michigan law governed the diversity action. Federal procedural rules controlled the dismissal inquiry, while Michigan substantive law supplied the contract principles.

Miller-Davis Co. v. Ahrens Constr., Inc., 848 N.W.2d 95, 104 (Mich. 2014)

This decision supplied the three elements of a Michigan breach-of-contract claim: a contract, a breach, and resulting damages. Because the contract’s existence was uncontested, the appellate court focused on whether Yoo plausibly alleged an actionable breach. His allegations of diminished traffic and value could not independently overcome the waiver.

C. Contract interpretation

Wyandotte Elec. Supply Co. v. Elec. Tech. Sys., Inc., 881 N.W.2d 95, 103 (Mich. 2016)

This authority established that interpreting an unambiguous contract is a question of law and that interpretation seeks to implement the parties’ intent. It supported resolving the dispute at the pleading stage rather than requiring factual development merely because the parties disagreed about the agreement’s effect.

In re Smith Tr., 745 N.W.2d 754, 757–58 (Mich. 2008)

The court relied on this decision for determining intent from contractual language given its plain and ordinary meaning. That approach favored the waiver’s express references to traffic, revenue, and migration over Yoo’s narrower understanding of what he had surrendered.

Klapp v. United Ins. Grp. Agency, Inc., 663 N.W.2d 447, 453–54 (Mich. 2003)

This case supplied two related principles: courts should give effect to every contractual word and clause, and genuinely ambiguous language presents a factual question. The Sixth Circuit treated the relevant provisions as sufficiently clear to resolve without a factfinder. Reading the waiver as addressing only termination would fail to give adequate effect to its separate references to performance contingencies.

D. Modification and allocation of unknown risks

Bank of Am., NA v. First Am. Title Ins. Co., 878 N.W.2d 816, 830 (Mich. 2016)

This decision recognized that parties may modify contractual rights and duties. The Sixth Circuit used it to acknowledge the altered migration schedule while distinguishing that change from a modification of the waiver. The parties’ agreement to perform events in a different order did not establish an agreement to eliminate the consequences attached to expiration of inspection.

Coosard v. Tarrant, 995 N.W.2d 877, 886 (Mich. Ct. App. 2022)

The court cited this case for the proposition that “as is” clauses fundamentally allocate the risk of unknown losses. The APA’s “as is” provision reinforced the transaction’s risk-allocation structure. It was not, however, the sole basis for dismissal: the court emphasized that the express performance waiver independently covered the traffic-and-revenue claim.

5. Analysis of the Court’s Legal Reasoning

A. The agreement distinguished functional migration from final transfer

The contractual definition of Completed Migration was central. It identified a functional milestone—enough assets had transferred to permit assessment of revenue—not the end of every transfer obligation. The agreement expressly allowed migration activity to continue afterward.

That structure defeated the assumption that inspection and its resulting waiver necessarily awaited completion of all seller performance. Even under the original sequence, some migration work could remain after inspection ended. The waiver expressly contemplated performance changes during the Migration Process.

B. Expiration of inspection triggered a broader consequence than loss of cancellation rights

The relevant provision waived:

“any and all contingencies in connection with the purchase of the Assets,” including changes in “gross revenue, net revenue, expenses, traffic, and other metrics of performance,” including changes “during the Migration Process and/or during the Inspection Period.”

Yoo sought to distinguish surrendering a right to cancel the transaction from surrendering a damages claim. The court rejected that distinction under this agreement. The termination right and the performance waiver were separate contractual features; limiting the latter to cancellation would underread its detailed language.

The court thus treated the alleged indexing-related loss as falling within the performance risks Yoo had accepted. Although the opinion framed the result as a failure plausibly to allege breach, its operative reasoning was that the contractual waiver defeated this particular claim.

C. A scheduling modification did not rewrite the risk allocation

The parties’ decision to inspect before migration created an obvious practical problem: a migration-related defect might emerge only after the opportunity to reject the transaction had ended. Nevertheless, the court distinguished the commercial consequences of the revised schedule from the legal scope of the modification.

The complaint supported a change in sequencing. It did not support a corresponding change to the waiver’s trigger or coverage. The court therefore declined to infer that the parties had preserved post-inspection claims merely because their revised timetable made those claims more important to the buyer.

This is the opinion’s most transferable reasoning: a modification should not be assumed to extend beyond the contractual terms actually changed.

D. Section 13(c) did not displace the express waiver

Yoo’s theory had an understandable textual foundation. Section 13(c) imposed a normal-business-practices obligation throughout migration, and Grupo allegedly committed the indexing error during that process. But the court did not analyze in detail whether failing to enable indexing was itself outside normal business practices. Instead, it concluded that the resulting traffic-and-revenue claim fell within the waiver.

This produces a tension between a continuing performance obligation and a provision restricting claims for specified consequences. The opinion resolves that tension against Yoo’s particular claim without defining every circumstance in which § 13(c) might remain enforceable. It should not be read as eliminating that covenant entirely or deciding the treatment of materially different misconduct or losses.

E. The “as is” clause supported, but did not replace, the specific waiver

Yoo argued that “as is” language negates warranties rather than ordinary breach-of-contract claims. The court found insufficient support for his argument but also explained why it did not resolve the case: regardless of the “as is” clause’s independent reach, the separate waiver covered the claim at issue.

Accordingly, the decision does not establish that every “as is” sale excuses every later failure to perform an affirmative contractual promise. Its strongest foundation is the APA’s express coverage of performance changes during migration.

F. Factual allegations could not overcome the contractual obstacle

The alleged 57% traffic decline and substantial loss in value supplied a concrete account of harm. But the dispute was not whether those losses were large enough or whether Grupo’s mistake was sufficiently serious. The dispositive question was whether the APA permitted recovery on the pleaded theory.

Because the court could consider the agreement and found its relevant terms unambiguous, discovery was unnecessary to resolve that legal question. The opinion did not establish the alleged losses as proven damages or determine whether they could support some different, preserved claim.

6. Potential Impact

Digital-business transactions

The decision highlights the interaction between technical migration risks and contractual inspection mechanisms. A website may transfer legally while remaining vulnerable operationally. If inspection rights expire before essential transfer work is complete, a buyer may lose protection before the relevant defect becomes apparent.

For transaction drafting, the opinion underscores the importance of coordinating inspection periods, migration milestones, and waivers. Parties wishing to preserve claims for seller-caused migration errors should address that expressly rather than assume a normal-business-practices covenant overrides a performance waiver.

Contract modifications

The reasoning may influence disputes involving amended implementation schedules, delayed transitions, or staged asset deliveries. A party changing a deadline should also consider related acceptance provisions, termination rights, releases, and risk allocations. Changing one contractual mechanism may leave the others intact.

Litigation and limits

The opinion illustrates how a contract incorporated into a complaint can defeat an otherwise detailed factual claim at the dismissal stage. A claimant must identify not only an alleged performance failure but also why the requested remedy survives applicable contractual limitations.

Its reach remains limited. The court did not decide the negligence claim on appeal, establish a general immunity for website sellers, or determine the effect of differently worded waivers. As an unpublished decision applying existing law, it is best understood as a persuasive illustration rather than a sweeping new doctrine.

7. Complex Concepts Simplified

Rule 12(b)(6) dismissal

A decision that the complaint does not state a legally sufficient claim, even accepting its well-pleaded factual allegations as true.

Plausibility

The complaint must contain facts supporting a reasonable inference of legal liability. A harmful mistake alone is insufficient when the governing contract bars the asserted claim.

De novo review

The appellate court decides the legal issue afresh without deferring to the lower court’s conclusion.

Contractual waiver

A contractual surrender of a right or protection. Here, the court interpreted the waiver to cover the particular performance-related claim after inspection expired.

“As is” purchase

An agreement allocating certain risks concerning the purchased assets to the buyer. Its precise effect depends on the contract and applicable law.

Completed Migration

A defined contractual checkpoint, not necessarily the completion of every technical transfer task.

Surplusage or nugatory language

Words treated as redundant or without effect. Courts generally avoid interpretations that make contractual provisions meaningless.

Website indexing

The process through which search engines discover and catalog website content. Disabling it can sharply reduce search-driven traffic.

8. Conclusion

Joon Bum Yoo v. Grupo MContigo S.L. demonstrates that an express performance waiver can defeat a migration-related contract claim even when the seller allegedly caused the loss after inspection ended. Moving migration to a later date did not, without more, modify the waiver.

The broader lesson is precise rather than categorical: inspection rights, continuing performance duties, and risk-allocation clauses must be read together—and revised together when the transaction’s sequence changes.